Today (Friday) Is RiRi's birthday, but we're gonna cele-ele-ele brate-brate-brate all weekend, because, Rihanna!! Join us right here, and watch 27 of her hottest videos in honor of her 27th. Fun fact: She has more Certified videos than anyone else with 20!

Ariana loved like it was the end of the world, Imagine Dragons got Certified, and made one lucky fan's year, and Taylor, well, she did what Taylor does. Check out our full recap of all things Hot This Week.